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18. गा ८059 - डा = +/2sinf, prove that cosf + sinf = /2sinf |
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Answer» =================================cosA - sinA = √2 sinA cosA = sinA + √2 sinA cosA = sinA (√2 + 1) sinA/cosA = 1/(√2 + 1) sinA/cosA = 1/(√2 + 1) * (√2 - 1)/(√2 - 1) sinA/cosA = (√2 - 1)/(2 - 1) sinA/cosA = √2 - 1 sinA = (√2 - 1)cosA sinA = √2 cosA - cosA sinA + cosA = √2 cosA hit like if you find it useful |
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