Question

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Answer 1

Answer:

$48). \: A= \frac{π}{4} \\ (1+tanA)(1+ {tan}^{2} A)(1+ {tan}^{3} A) \\ =(1+tan\frac{π}{4})(1+ {tan}^{2} \frac{π}{4})(1+ {tan}^{3} \frac{π}{4}) \\ = (1 + 1)(1 + {1}^{2} )(1 + {1}^{3} ) \\ = 2 \times 2 \times 2 \\ = 8 \\ \blue{\rightarrow (3) \: is \: correct} \\ 49). \: cos \: 90° = 0 \: \: and \: \: cos \: 270° = 0 \\ cos \: 201°.cos \: 202°.cos \: 202°…cos \: 270°.…cos \: 300° \\ = cos \: 201°.cos \: 202°.cos \: 202°…0.…cos \: 300° \\ = 0 \\ \blue{\rightarrow (4) \: is \: correct} \\ \\ \red{\mathfrak{ \large{\underline{{Hope \: It \: Helps \: You}}}}} \\ \blue{\mathfrak{ \large{\underline{{Mark \: Me \: Brainliest}}}}}$