can someone help me out

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78

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Find 𝑐𝑜𝑠(2𝛼 + 𝛽) given that 𝛼 = 𝑠𝑖𝑛^−1 (4/5 ) and 𝛽 = 𝑡𝑎𝑛^−1 (12/5).

Guest May 2, 2023

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1⁺⁰ Answers

+214

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I get about -0.99384, using a calculator.

gb1falcon May 2, 2023

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