cos2Acos2B + sin²(A-B) - sin²(A+B)

cos2Acos2B + sin²(A-B) - sin²(A+B) = cos(2A+2B)
1. 1 answer
2. asked by Kewal
3. 1,872 views
If sin(θ) = -1/√2, find sin2(θ). (Recall that sin2(θ) means (sin(θ))2.)sin2(θ) =
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2. asked by Jimmy
3. 1,092 views
If A + B + C = 180°, Prove thatSin² (A/2) + sin² (B/2) + sin²(C/2) = 1 – 2sin (A/2) sin (B/2) sin(C/2)
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2. asked by Kewal
3. 476 views
If A + B + C = 180°, Prove thatSin² (A/2) + sin² (B/2) - sin²(C/2) = 1 – 2cos (A/2) cos (B/2) sin(C/2)
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2. asked by Kewal
3. 569 views
What is the first step. Explain please.Which expression is equivalent to cos^2x + cot^2x + sin2^x? a) 2csc^2x b) tan^2x c)
1. 4 answers
2. asked by Jake
3. 1,239 views
Find the limit as h approaches 0 of sin²(3x+3h) - sin²(3x) / h
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2. asked by Erica
3. 420 views
cos²(θ) – 3sin(θ) – sin²(θ)= –2____________________________ I am having a hard time figuring out what to do. Do I use
1. 2 answers
2. asked by sweetiepie
3. 512 views
The expression 4 - cos² A is equivalent to1)5 - sec² A 2)5 - sin² A 3)5 + sin² A 4)5/sec² A
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2. asked by Moe
3. 661 views
In a ∆ABC, if ∠C = 90°, prove that sin2 A + sin2 B = 1.
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2. asked by arnav
3. 253 views
Prove the identitytan2(x) - sin2(x) = tan2(x) sin2(x)
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2. asked by horsecrazygirly
3. 142 views