Question

Please solve these two questions with the solution (better on paper)
please help!!!

Answer 1

Answer:

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3)

if the number 5n,for any n were to end with the digit zero then it would be dividable by 2 and 5 that is the prime factorization of 5n would contain the prime 2 this is not possible because 5n so only primes in the Factorization of 5n is 5 only . therefore there is no natural number n for which 5n ends with digit zero.

4)

Given that,

sin 2a = cos (a - 18°)

• sin A = cos (90° - A) ]

➡ cos (90° - 2a) = cos (a - 18°)

➡ 90° - 2a = a - 18°

➡ 90° + 18° = a + 2a

➡ 3a = 108°

➡ a = 108°/3

➡ a = 36°

➢ Therefore, the value of a is " 36° "

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Step-by-step explanation:

℘ℓḙᾰṧḙ ՊᾰԻк Պḙ ᾰṧ ♭Իᾰ!ℵℓ!ḙṧт ✌✌✌