Question

If sinQ= x then cos Q=​

Answer 1

${\bold{\underline{\blue{\sf{Given:}}}}}$

sinQ = x

${\bold{\underline{\pink{\sf{To \: Find:}}}}}$

cosQ = ?

${\bold{\underline{\red{\sf{Formula:}}}}}$

${\boxed{\sf{sin²A+cos²A=1}}}$

${\bold{\underline{\green{\sf{Solution:}}}}}$

sin²Q + cos²Q = 1

x² + cos²Q = 1

cosQ = $\sqrt{(1 - x²)}$

cosQ = ${\underline{\red{\sqrt{(1 + x)(1 - x)}}}}$

Answer 2

√((1+x)(1-x))

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